Perlin noise parameters:

Image Size:
Scale:
Region 1:	cutoff	color
Region 2:	cutoff	color
Region 3:	cutoff	color
Region 4:	cutoff	color
Spherize

Sample scale functions (click to try):

• 1
• 10
• i
• 1 / (i + 1)
• 1 / Math.pow(i + 1, 2)
• 1 / Math.pow(2, i)
• i < 3 ? 0 : 1 / Math.pow(2, i - 3)